Hello, dear communityFrom the document PDF 32000-1:2008, I have understanded, that pdf-file allways must have keyword „trailer“. But attached file not contains this keyword. Is it OK?Thanks im advance for helpuploads/1345/Te.Standard.pdf

Because I have found only in PDF 32000-1:2008 (7.5.5 File Trailer) namely"The startxref line shall be preceded by the trailer dictionary, consisting of the keyword trailer followed by a series of key-value pairs enclosed in double angle brackets"

The PDF file you attached uses object streams, including a cross-reference stream that contains the trailer entry - see section 7.5.8.1 of 32000-1. For PDF files of this sort, you cannot assume that you will find an uncompressed "trailer" keyword visible near the end of the file. Instead, you must process the cross-reference stream to get the trailer (and the cross-reference table) information.

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